baker



(No Model.) 2 Sheets-Sheet 1.

W. C. BAKER. STEAM BOILEB..

No. 590,471. Patented sept. 21,1897..

UNITED STATES WILLIAM o. BAKER,

STEAM PATENT EEICE.

or NEw YORK, N. Y,

SPECIFICATION forming part of Letters Patent No. 590,471, datedSeptember 21, 1897.

Application filed vEehruaiy 8, 1897. Serial No. 622,461. (No model.)

Be it known that I, XVILLIAM C. BAKER, a citizen of the United States,residing in .the city, county, and Statevof New York, have invented auImprovement in Steam-Boilers, of which the following is a specification.

In Letters Patent No. 537,177, granted to me April 9, 1895, a waterheating apparatus is represented in which there are upper and lowerpipes crossing the fire-chamber and connected by vertical pipes that arelarger at the upper part than at the lower. These pipes wereoriginallymade by me and screwed together and were employed in afire-chamber with the fuel closely surrounding and rising above thetubes.

I find that sections can be advantageously made with upper and lowertubes and intermediate pipes that are largest at the top, and cast iniron or steel, copper, or bronze, and placed transversely of thefire-chamber over the grate-bars in connection with a divisionseparating the fire-chamber from a flue below a steam-boiler, the upperends ofthe tubular sections being connected to such steamboiler; and Iemploy return circulating-pipes from the lower part of the boiler to thesections at one end, and the steam as it is passed away from the boileris carried upward to superheaters formed of one or more boiler-sectionsconstructed as aforesaid, such sections being placed in the flue thattakes away the products of combustion, and I prefer to make use ofinclosing brickwork and a return-nue above the boiler, so that theproducts of combustion from the fire-chamber pass off at the rear endand return beneath the boiler and around the return circulating-pipesand then pass away over the boiler and descend around thesuperheating-sections before ascending* 4 and an upper tube 5,Withintermediate ver- 'tical tubes G, which are largest at the upper ends,where they open into the upper tube 5, and smallest at the lower ends,where they open'into the lower tube 4f, and these boilersections arepreferably of cast metal of sufiicient strength to withstand thepressure, and at one end of each tube 4 is a cap 7, by the removal ofwhich access is given to the tube for removing any sediment.

The boiler E is preferably cylindrical and there are couplingconnections F between the upper end of the upper tube 5 and the boiler,such coupling connections advantageously opening into the lower part ofthe boiler at one side thereof, and there are return-pipes G, connectedby elbows 8 to the under side of the steam-boiler E and by elbows andvertical' portions 9 with the back ends of the lower tubes 4, so thatthe boiler-sections and the lower part of the boiler being filled withwater the heat will act to cause such water to rise through thetubes 6and upperv tube 5 into the boiler and return through the elbows ends ofthe lower tubes 4.

The boiler `may be of any desired length, and the number ofboiler-sections D may be greater or less, according to the capacityrequired of the boiler, and these boiler-sections are advantageouslyplaced as near each other as consistent with'the proper space for boltsand connections.

The side walls l0 are built' up and preferably closed in at the offsets11 to the sides of the boiler E, and there is a partition II offire-brick resting upon the upper tubes 5 of the boiler-sections andextending from the front wall 12 of the inclos ure to near the back wall13, so that the products of combustion will pass to the rear and ascendbetween the end of the partition II and back wall 13, and such productsof combustion will return over the partition II through the iiue beneaththe boiler and passup between the front wall 12 and the end of theboiler F and return over the boiler through a flue 20, formed beneaththe arch I, and will descend behind the back wall 13 in the iiue thatthere is between such back wall and the wall 14 at the base of thechimney J and will ascend into such chimney or final escape-iiue.

S, pipes G, and vertical tubes 9 to the back IOO The steam from theboiler E is to be taken off by any suitable pipes. I haverepresented thepipes K as rising from the boiler and extending to the rear andconnecting to the superheaters formed of the boiler-sections D',standing in reverse positions and connected at their ends, the escapefor the steam being from one end of the lower superheating-section. l

It will now be understood that the fuel is to be supplied upon thegrate-bars B and either close to or surrounding the lower portions ofthe boiler-sections D, and the products of combustion rising from thefuel pass between the vertical tubes 6 and below the upper tube 5 of theboiler-sections, and in consequence of the return-bends 15 at the endsof the upper tubes 5 the rising column of hot water is easily led backover the partition H and passes into the boiler7 and the return-bends 15and the coupling connections F are exposed to the action of the heat inthe flue between the partition I-I and the under side of the boiler, andthe return-pipes G are also exposed to the action of heat, so that mostof the heat is absorbed and transferred to the water in theboiler-sections and in the boiler, and what heat may escape in the flue2O between the top of the boiler and the arch I serves to superheat thesteam in the top of the boiler, and such steam is further superheated bythe action of the descending products of combustion in the ilue betweenthe walls 13 and 14,

- I find it advantageous to employ a safety-vent plate at L similar tothat shown in my Patent No. 473,722, and there is a chest or boxsurrounding the body of the safety-vent with a pipe M, leading to theash-pit, so that in case the pressure becomes excessive and thesafety-vent plate gives way the steam passes by the pipe M into theash-pit in suicient vvolume to deaden the re, or the steam-pressure mayact upon an alarm or other device for calling attention to the re of theboiler. Gage-tubes and cocks should be provided for lthe boiler, asusual.

This apparatus is applicable to the generation of steam for an engine orfor any heating apparatus,.and it may also be used for heating the waterin any hot-water heating apparatus.

The top part of the boiler E acts as a super'- heater in consequence ofthe flue passing over thesame, and the steam descending in thesuperheaters is raised to the temperature of the escaping gases, ornearly so.

There may be a mud-drum N below the back ends of the vpipes 4 andconnected with them by vertical pipes 17, so that sediment may pass intothis 1n ucl-drum and be blown off periodically.

I claim as my invention- 1. The boiler-sections each formed with anupper and a lower tube connected by intermediate vertical tubes that arelargest at the top and open into the upper tube and smallest at thebottom and open into the lower tube, the same being cast integral andthe lower tube having a removable cap at one end and the upper tubehavinga return-bend in combination with a boiler above theboiler-sections and intermediate coupling connections between thereturn-bends and the boiler, and return-pipes between the boiler and oneend of the lower pipe in each boiler-section, substantially as setforth.

2. The combination with a boiler, of a row of tubular boiler-sectionsbelow the boiler, each boiler-section having an upper and a lower tubeand intermediate vertical tapering tubes, a return-bend and couplingconnection between the upper tube ot' the section and the boiler 'andreturn circulating-pipes between the boiler and the back end of thelower tube in each boiler-section, substantially as set forth.

3. The combination with a boiler, of a row of tubular boiler-sectionsbelow the boiler, each boiler-section having an upper and a lower tubeand intermediate vertical tapering tubes, a return-bend and couplingconnection between the upper tube of the section and the boiler andreturn circulating-pipes between the boiler and the back end lof thelower tube in each boiler-section, a partition of refractory materialabove the upper tubes of the boiler-sections and below the boiler toconne the products of combustion around the tubes of theboiler-'sections and allow them to pass away at the back end and returnunder the boiler, substantially as set forth.

4. The combination with the steam-boiler and the inclosure for thefire-chamber and flues, of an arch over the boiler inclosing an upperiiue, grate-bars below the tire-chamber, boiler-sections crossingthrough the .tirechamber, each boiler-section having a lower tube and anupper tube and vertical tapering connecting-tubes and coupling.connections between the sections and the boiler, return circulatingwater-pipes and a partition above the upper tubes of the boiler-sectionsand separating the fire-chamberfrom the iiue below the boiler whichcontains the coupling connections and the return circulating-pipes,substantially as set forth. p

5. The-combination with the steam-boiler and the. inclosure lfor thefire-chamber and flues, of an arch over the boiler inclosing an upperflue, grate-bars below thefre-'cham'belg boiler-sections crossingthrough the lirechamber, each boiler-section .having a lower tube and anupper tube and vertical tapering connecting-tubes and couplingconnections between the sections andthe boiler, return circulatingwater-pipes and a partition above IOO IIO

the upper tubes of the boiler-Sections and positions within the verticalflue, and steamseparating the fire-chamber from the flue bepipeseonueeting With such superheaters, sublo 10W the boiler which containsthe coupling stantially as set forth.

connections and the return circulating-pipes, Signed by me this 3d dayof February, 1897 5 e. flue between the back walls receiving the XVM. C.BAKER.

products of combustion from the flue over /vitnesses: the boiler and.superheating-sectons similar GEO. T. PINOKNEY, to the boiler-sectionsand standingin reverse S. T. HAVILAND.

